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Financing Activities (Tables)
 6 Months Ended
Jun. 30, 2020
Debt Disclosure [Abstract]  
Schedule of Line of Credit Facilities The following credit facilities were in place at:
 June 30, 2020December 31, 2019
 Expiration
Date		CapacityBorrowedLetters of
Credit
and
Commercial
Paper
Issued		Unused
Capacity		BorrowedLetters of
Credit
and
Commercial
Paper
Issued
PPL       
U.K.       
WPD plc       
Syndicated Credit Facility (a)Jan. 2023£210  £162  £—  £48  £155  £—  
WPD (South West)       
Syndicated Credit Facility (b)May 2023220  —  —  220  40  —  
WPD (South Wales)
Syndicated Credit Facility (c)May 2023125  5  —  120  —  —  
WPD (East Midlands)      
Syndicated Credit FacilityMay 2023250  —  —  250  —  —  
WPD (West Midlands)      
Syndicated Credit Facility (d)May 2023250  39  —  211  48  —  
Uncommitted Credit Facilities (e) 100  60  4  36  —  4  
Total U.K. Credit Facilities (f) £1,155  £266  £4  £885  £243  £4  
U.S.       
PPL Capital Funding (g)       
Syndicated Credit FacilityJan. 2024$1,450  $—  $—  $1,450  $—  $450  
Term Loan Credit FacilityMar. 2021200  200  —  —  —  —  
Bilateral Credit FacilityMar. 202150  —  —  50  —  —  
Bilateral Credit FacilityMar. 202150  —  15  35  —  15  
Term Loan Credit FacilityMar. 2021100  100  —  —  —  —  
Term Loan Credit FacilityMar. 2022100  100  —  —  —  —  
Total PPL Capital Funding Credit Facilities$1,950  $400  $15  $1,535  $—  $465  
PPL Electric        
Syndicated Credit FacilityJan. 2024$650  $—  $201  $449  $—  $1  
LG&E      
Syndicated Credit FacilityJan. 2024$500  $—  $—  $500  $—  $238  
Total LG&E Credit Facilities$500  $—  $—  $500  $—  $238  
KU       
Syndicated Credit FacilityJan. 2024$400  $—  $—  $400  $—  $150  
Total KU Credit Facilities $400  $—  $—  $400  $—  $150  
 
(a) The amounts borrowed at June 30, 2020 and December 31, 2019 were USD-denominated borrowings of $200 million for both periods, which bore interest at 1.00% and 2.52%. The interest rates on the borrowings are equal to one-month USD LIBOR plus a spread.
(b) The amount borrowed at December 31, 2019 was GBP-denominated borrowings which equated to $51 million and bore interest at 1.09%. The interest rate on the borrowing are equal to one-month GBP LIBOR plus a margin.
(c) The amount borrowed at June 30, 2020 was GBP-denominated borrowing which equated to $6 million and bore interest at 0.60%. The interest rate on the borrowing are equal to one-month GBP LIBOR plus a margin.
(d) The amount borrowed at June 30, 2020 and December 31, 2019 were GBP-denominated borrowings which equated to $48 million and $62 million and bore interest at 0.60% and 1.11%. The interest rates on the borrowings are equal to one-month GBP LIBOR plus a margin.
(e) The amount borrowed at June 30, 2020 was GBP-denominated borrowings which equated to $74 million and bore interest at 1.35%.
(f) At June 30, 2020, the unused capacity under the U.K. credit facilities was $1.1 billion.
(g) The interest rates on the borrowings are based on one-month LIBOR plus a spread, which resulted in a weighted-average rate of 1.04% at June 30, 2020.
Schedule of Short-term Debt The following commercial paper programs were in place at:
 June 30, 2020December 31, 2019
Weighted -
Average
Interest Rate		CapacityCommercial
Paper
Issuances		Unused
Capacity		Weighted -
Average
Interest Rate		Commercial
Paper
Issuances
PPL Capital Funding—%$1,500  $—  $1,500  2.13%$450  
PPL Electric
0.26%650  200  450  —  
LG&E—%350  —  350  2.07%238  
KU—%350  —  350  2.02%150  
Total $2,850  $200  $2,650   $838